power point presentation on social science -interior of earth

7/24/2019 Power Point Presentation on Social Science -Interior of Earth

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INTERIOR OF

EARTH


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Interior of earthThere are many limitations in collecting

information about the mysteries of the Earth'sinterior directly.

The temperature and pressure inside the Earthincreases with depth. The variations in pressureis due to the weight exerted by the overlying

layers.

The temperature at the centre of the Earth isabout 5000O C. emember that even iron meltsat !5"#O C.


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Interior of earthThe di$erent sources from which we get

information on the Earth's interior.

%rom the materials reaching the Earth'ssurface through volcanic eruptions.

&ata collected from mines.

nalysis of the propagation of wavesgenerated during earth(ua)es etc.


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Interior of earthOn the basis of varying density ad otherphysical and chemical properties of roc)sthe earth can be divided in to mainlythree there are

!. Crust

*. +antle

". core


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Interior of earth

CRUSTMANTLE

OUTER CORE

INNER CORE


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CRUSTThe comparatively

thin outer shell ofthe Earth.

pproximately ,0)m thic).

Two parts-continental crustoceanic crust.


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CRUSTContinental crust and oceaniccrustAs silica and alumina are the

chief contents,the continental crust is also

known asSIAL.As silica and magnesium are the

chief contents,

the oceanic crust is also known

asSIMA.


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MANTLE

Located beneath the crust.

Extends upto 29 !"

#ro" the crust.

T$o parts% upper "antle&

lo$er "antle.


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MANTLE'pper "antle

Upper mantle

The upper mantle, made

up of silicon compounds,is in a solid state.

.


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MANTLE

Lower mantle

The lower mantle,located beneath the

upper mantle, is in a

semi-liuid state


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CORE

Central part ofthe Earth.

%rom */00 )m to"1! )m

Two parts- outer

core inner core.


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CORE

Outer core andinner core

The materials inthe outer coreare in a moltenstate.


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CORE

Due to the highpressureprevailing at thecentre, the innercore is in a solidstate.


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CORE

As it is mainly

made up of theminerals nickel(Ni) and iron(Fe), it is also

known as NF!.


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Thank you

power point presentation on social science -interior of earth

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